Propagation
Collect seeds when green and they can be sowed directly or stratify for 2 to 3 months and then place in a cold frame. 

Germination may take up to 1 year. The seed coat on the species is thin and should not be allowed to dry out or become too wet as it will rot.

Botanic information
Leaf: The broad ovate leaves are slightly cordate at the base and the apex is long acuminate. The new growth has a red tinge and mature foliage can develop 3-5 lobes. The reddish petiole is up to 60 mm (2⅜in) long and the leaves turn orange red during autumn before falling.

Flower: The small cyathiform (cup-shaped) greenish flowers have 5-tepals that are tinged red on the outside and the slender pedestal is reddish. The flowers arranged in a pendant raceme that is up to 80mm (3⅛in) long with a deep red peduncle, and appear during mid-spring with the foliage.

Fruit: The small greenish twin samara has wings that diverged almost horizontally and are partially hidden by the persistent calyx.

General information on pruning Acer species 
The Maples normally do not require regular pruning apart from damaged, diseased or dead wood removal and this should be carried out from autumn to winter. Pruning in late winter or spring may result in bleeding of the sap and should be avoided. Remove reverted branches in variegated trees and clean up split bark with a sharp knife and allow natural healing.